Saheeli Rai + Sun Titan + Mirrormade + Encroaching Mycosynth

Saheeli Rai
Sun Titan
Mirrormade
Encroaching Mycosynth

Requires
Saheeli Rai must be on the battlefield. Sun Titan must be on the battlefield. Mirrormade must be in the graveyard. Encroaching Mycosynth must be on the battlefield. At least three loyalty counters on Saheeli Rai.
Steps
  1. Activate Saheeli Rai's second ability by removing two loyalty counters from it, creating a token copy of Sun Titan with haste.
  2. When the Sun Titan token enters the battlefield, return Mirrormade from your graveyard to the battlefield as a copy of Saheeli Rai.
  3. Put the oldest Saheeli Rai in your graveyard due to the legend rule.
  4. Activate Mirrormade's second ability by removing two loyalty counters from it, creating a token copy of Sun Titan with haste.
  5. When the Sun Titan token enters the battlefield, return Saheeli Rai from your graveyard to the battlefield.
  6. Put the oldest Saheeli Rai in your graveyard due to the legend rule.
  7. Repeat.
Results
Infinite creature tokens with haste. Infinite ETB.

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